نتایج جستجو برای: dust polarity

تعداد نتایج: 66900  

Bidabadi , M, Sedighi , M. , Seyedi , M. ,

  The results of an experimental study of the combustion of aluminum particles in N2/O2 gas mixtures are presented and interpreted. This research focuses on measurement of flame speed and combustion velocity in aluminum particle dust cloud combustion. The dust dispersion technique uses an annular high-speed jet which disperses dust continuously supplied via a piston-type dust feeding system. Pa...

Abed Zeidali, Hossein Barani, Mohsen Hosseinali Zadeh

Natural resources have been attracted a great deal of attentions and have been frequently exploited for many years. Dust is one of natural disasters mainly in recent years; here, in south west of Iran, it had destroyed the rangelands. The dust has detrimental effects on the rangelands, livestock and livestock production. High concentrations of dust may lead to the coughing, nasal discharge, whe...

Dust storms and high winds is a natural process that occurs in everywhere of arid and semi-arid land in the world. The phenomenon of dust is one of the most important consequences of the desertification that cause different damages. The aim of this study was to analyze the occurrence of dust in the city of Bandar Abbas. First, the frequency of monthly and annual dust from 1985-2005, in the city...

ژورنال: علوم آب و خاک 2022

Dust storms in arid and semi-arid regions have harmful impacts on the environment, the economy, and the health of local and global communities. In this study, the frequency of annual dust events in twenty-five stations and five climatic variables including rainfall, maximum annual wind speed, average annual wind speed, maximum annual temperature, and average annual temperature in arid regions o...

ژورنال: علوم آب و خاک 2015
جعفری, رضا, سلطانی, سعید, مهرابی, شهباز,

Since climate has a major impact on dust generation, it is essential to identify the climatic parameters affecting this phenomenon. In this study, climatic parameters including temperature, relative humidity, rainfall, maximum wind speed and direction were selected and their relationship with visibility data and also dust storm days (recorded at meteorological stations) was analyzed on monthly ...

One of the most important environmental challenges which exists in the Middle East and Iran in recent years is the phenomenon of dust. As regards the Western half of Iran is in proximity to large deserts and continually effects the country deserts dust and specially that western half and also the unpleasant effects that these dusts have on environment and people health; so the purpose of this s...

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In this study, the changes in the Khorramabad storm in the period of 1952 to 2015 have been investigated. For this purpose, data from meteorological codes 06 and 07 were received from the Meteorological Organization of the country, and after identifying the days of winding with dust storms and calculating their monthly frequency, monthly, seasonal and annual time series were analyzed. In this s...

One of the environmental concerns during the past decade is dust pollutant. This phenomenon is extensively known around the globe. In Iran, this destructive phenomenon has created serious problems among environmental policy-makers in general and agricultural producers in specific. Kermanshah Province is located near Iraq, a neighboring country in west part of Iran. It is believed that Iraq is m...

ژورنال: طلوع بهداشت یزد 2013
امینی گندمانی, روح الله, برخورداری, ابوالفضل, زارع, محمدجواد, زواررضا, جواد, میرزایی, مسعود,

  Background : Occupational exposure to dust generated in the process of carpet weaving which can lead to pulmonary complications. The aim of this study was to investigate the association between exposure to carpet dust size and parameters of lung function.   Method : This retrospective case-control study was performed on 95 carpet weaver City Khomein. The total exposure inhaled ca...

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